Some Cytological Observations in the Loganiaceae

In a previous paper (Gadella, 1961) I suggested that the basic chromosome number of the Loganioideae might possibly be x = 6. The chromosome number of Anthocleista djalonensis Chev. (2n = 60) was in accordance with this supposition. Further investigations in the Loganiaceae, however, are highly desirable. This paper deals with the chromosome numbers of 7 species of Loganiaceae. The following data might contribute to a more complete knowledge of the relationships between the genera and species of the Loganiaceae.